RESUMO
Aiming at overcoming the limitations of the plaster-casting method in traditional prosthetic socket fabrication, the idea of reconstructing the 3D models for bones and skin of the residual limb is proposed. Given the two-dimensional obtained image through CT scanning, using image processing and reverse engineering techniques, the 3D solid model of the residual limb can be successfully reconstructed. The new approach can reproduce both the internal and the external structure of the residual limb. It can moreover avoid making a positive mould by the way of manual modifications. In addition to this, it can provide a scientific basis for the individualization of prosthetic socket design.
Assuntos
Membros Artificiais , Imageamento Tridimensional/métodos , Articulação do Joelho/diagnóstico por imagem , Prótese do Joelho , Desenho de Prótese/métodos , Ajuste de Prótese/métodos , Interpretação de Imagem Radiográfica Assistida por Computador/métodos , Simulação por Computador , Desenho Assistido por Computador , Análise de Falha de Equipamento/métodos , Humanos , Modelos Biológicos , Interface Usuário-ComputadorRESUMO
@#Objective In the prosthetic socket design process, the high cost and radiation deficiency caused by CT scanning which is a routine way to obtain the cross section image of the residual limb remain problems. Ultrasonic measuring approach is proposed to gain the bones and skin contour of the residual limb. MethodsAn ultrasonic measuring device to get the multiple ultrasonic images of the residual limb was developed firstly, a compound algorithm to reconstruct the multiple images into 2D image was designed, and then the feature extraction on the bones and skin was made. Results Conclusion Comparing with the like-kind cross sectional scanning technique, the ultrasonic measuring method has the characteristic of no radiation and low cost.
RESUMO
It is an important approach for CAD/CAM of prosthetic sockets to establish digital model of residual lower limbs from amputees. In this thesis, ultrasonic imaging technology is utilized to extract the internal and external contours of residual lower limbs for their 3D modeling , and an ultrasound measurement system is developed.